Printing press



Oct 19 1926. 1,603,642

W. A. SALTER PRINTING PRESS Filed April 14, 1926 -2 Sheets-Sheet 1 Oct. 19 1926.

' 1,603,642 w. A. SALTER PRINTING PRESS Filed April 14, 1926 2 Sheets-Sheet 2 1 Patented Get. 19, 1926.

tihliTEfi STATES TVILLIAM A. SJLLTER, OF KANSAS CITY, MISSOURI.

PRINTING PRESS.

Application filed April 14,

This invention relates to printing presses of that class embodying aform-carrying reciprocating bed, and a revolving cylinder for making impressions, and more especially to a close-coupled one revolution and quick return press, and has for its object to produce a printing press that is simple and compact in its driving mechanism, capable of high speed and which will operate with smoothness and without jar or jerk in its reciprocating motions.

Another object is to produce a printing press in which the gearing of the mechanism is constantly in mesh.

Another object is to produce a printing press in which the form-carrying bed travels at a very much higher rate of speed in its return, than it does during its printing stroke, and is given a long range of travel with a relatively small cylinder diameter.

Another object is to produce a printing press in which the use of special devices or means, for the stopping and starting of the reciprocations of the form-carrying bed is eliminated.

Another object is to produce a printing press that can be run in either direction, without injury to the mechanism.

With these general objects in view and with others as may hereinafter appear, the invention consists in certain novel and peculiar features of construction and combinations of parts as hereinafter described and claimed;

And in order that it may be fully understood reference is to be had to the accompanying drawings, in which Figure 1,is a side elevation of a printing press embodying my invention, looking at it from the right hand or driving side of the press.

2 .is a vertical sectional end view 20 of the printing press to show the mechanical construction and operation of the members relatively to each other, looking at it from the back or rear end of the press.

Fig. 3,is a sectional vertical side view of the interior mechanism of the printing press, looking at it from the left hand side, and with the outside belt wheel and gears omitted.

Fig. 4:,is a diagrammatic view of positions of the driving mechanism of the reciprocating form-carrying bed, with its high return speed, and showing where the type 1926. Se1"ia1 No. 102,009.

bed and cylinder engage in the cycle of operation.

In the drawings, the main frame of the printing press 1, is journaled to carry the various shafts carrying the operating mecha- 1115111, provides the tracks on which the re ciprocating bed works, and has two upwardly extending sides in which the cylinder is hung and provides support at the top for support of the sloping feed table, not shown.

The driving power member 2, is mounted and rotates upon a fixed stud 31, that is securely fastened into the main bed or frame 1. This driving member 2 consists of a belt wheel at its outer end receiving power from an electric motor or other source, and of a small gear at its inner end and which interengages with the cylinder gear 4 and the crank-shaft gear 7, causing them to both ro tate in unison, they both being of the same diameter.

The cylinder gear 4:, is rigidly mounted on the cylinder shaft 3, which rotates with it. This cylinder shaft 3 is journaled at either end in bearings 28, 28 that are hung in the upwardly extending side rails of the main frame 1 and the cylinder shaft 3, has revolvably mounted upon it the printing cylinder 5. The cylinder driving lever 20, is firmly attached to the cylinder shaft 3, and carries at its outer end the adjusting screw 21, that bears against the cross member 5 of the printing cylinder. The coiled spring 22 is mounted upon the cylinder shaft 3, to which it is rigidly attached at one end, and the other end of this spring is attached or engages with the end of the cylinder 5 in such a way that the tension of the spring 22 causes the cross bar 5 to bear against the adjusting screw 21, of the driving lever The impression cylinder 5 consists of two ends having bearings mounted upon the cylinder shaft 3, and joining the two ends is the segmental peripheral impression platen 5 with a ribbed back for stiffness,

and diametrically opposite the impression platen 5" is the cross bar 5, also con necting the two ends of the cylinder, and acting as a counterbalance and a driven member for the lever 20 to engage. The cylinder also carries paper grippers 2 1, which may be operated in any usual manner, but the operating mechanism of these gripthereof, a segmental gear 6, that is slightly longer than the length of the impression platen 5, and the curve of thediametral pitch lineof this segmental gear 6, is approximately the same curve or circle, asthe curve or circle of the impression face of the impression platen 5", and the'function of this segmental gear 6 is hereinafter described;

The crank shaft gear '4', engageswith the power member 2, and is rigidly mounted upon the crank shaft: 8, that is jjournale'd in the main frame 1. I rigidly mounted integrally with it the crank 8 and pin 9, and the sliding bearing block 10 is mounted on the crank shaft pin '9 and engages with the slot 11 of the oscilla ting segmental gear' 11'. The oscillating segmental gear 11 is mounted on the shaft 28" as its fulcrum, and carries at its outer peripheral end a segmental gear that engages with thedriving count-ershaft gear 13. It also has the radialslot 11 in which the sliding bearing block 10 operates for driving purposes and gives to it its oscillatingmotions. The shaft 23 is mounted in the main frame 1, and carries 'the' oscillating V segmental gear 11.

The reciprocating form-carrying bed 15 is carried back and forward in its operations' on the'rollers26, 26, that travels-in-the tracks 27, 27,0f the main frame'l. This reci )rocatin form-carr in bed*15-"has as" an integral" part thereof driving racks=16, 16, that engage with the countershaft rack. gears 14, let;- it also carries'on its short rack 17"" that engages with the segi mentalcylinder gear 6, and'the" inking plate The'countershaft 12, isjourn'aled in the main frame 1, and carries rigidly mounted upon it, counter-shaft rack gears'lt, 14, en'-,

gaging with the driving racks 16', 16*of the form carrying bed l5, and 'it' also has rigidly mounted upon it the driving countershaft gear 13 engaging with the oscillating memher 11.

The delivery rollers25, thedeliveryfiy fingers shown in Fig. 1, but the operating mechanism thereof is not shown, but any usual form maybe used'as this is old and does not constitute a part of this invention.

The cylinder shaft bearings 28, 28 are hung in the upwardly extendingsides of the main frame 1. so thatthey may rotate in their seats, and the hearings for the cylinder shaft 3 are made eccentric totheoutmdecircumference of them, so thatlwhen these cylinder shaft bearings 28,28ar'e oscillatedin t'heii-seatsin the mainframe; it 'is'obvions it raises and lowers'the cylinder shaft; 3,

The crank shaft 8 hasupper side the" 32, and the inking rollers 19 are 'From the point X and the impression cylinder it carries, relatively to the reciprocating form-carrying tieda The throw oif lever 29 is hinged in the upwardly extending sides of the main me 1,..by the rod part 3i, and has an integral partthereof in the short toggle levers The eccentric shift levers 33 are rigidly attached to the cylinder shaft bearings 28, 28'a'nd engage with rods 30, which in turn engage with. theshort toggle levers 35, so that when the throw-off lever moved backward the toggle opens drawing the eccentric shift levers backward and raising the impression cylinder platen from an impression point, relative to the fornrcarryin 1; bed, and throwing the lever 29 forward locks the impression cylinder down.

In the operating of the oscillating segmental gearvll, that drives the reciprocating form-carrying bed, as illustrated in 4 the fulcrum of this segmental gear 11 being lined in the shaft and always in the same position to the crank shaft 8 which is at C, it is obvious that the crank pin 9 and its sliding bearing block 10 in their revolutions, use a great deal longer part of theircircumferential travel in driving the oscillatingsegmental gear 11 in one direc tion, than they do in driving it in the reverse direction of movement; To this pcculiarity ofm'ovement I utilize that part of the long circumferential travel of the crank pin 9' in driving the form-carrying bed during its printing stroke of travel, and the short section of the crank pins circumferential travel, as from the lines B C to lin A C for" the reverse movement. It also is obvious that when the crank pin 9 is at a po sition as'indicated at the line A C in a steady rotative movement, there is a very short period in which the oscillating segmental 11 is at rest, and as the crank pin goes forward for the impression strokeof the formcarrying bed 15 from this point: the line of travel of the crank pin is very obtuse to the radialline of the bearing block slot 11 and consequently this oscillating segmental 130a r 11, commences its movement very slowly from this period'of rest but graduall accelcrates with the continued movement of the crank pin 9, until at apoint approximately near X (the crank pin 9 rotating in unison with the cylinder 5) where the recipro at ing ,forntcarrying bed and the circumference of the'impression face of the platen 5 travel at the same speed, and at t I; point the cylinder segmental gear 6 engages with therac'k 17 of the form -carrying bec, of the crank pins' travel on however the speed ofthe forn'rcarrying bediis slightlyv greater than is the speed of thecylinder gear 4. and through the engagementof the segmental gear 6 with the rack L7, thef cylinder impression platen o travels without slippage with the form-carrying bed, this being allowedthrough the tension of the spring 22 and during which time the cross bar 5 moves away from the adjusting screw of the driving lever 20 and being at its greatest point away from the adjusting screw 21 when the crank pin 9 is at approximately point Z of its travel. From point Z of the crank pins travel onward, the circumferential diameter of the pitch line of the gear 4 gradually overtakes the speed of travel of the form-carrying bed 15 until at a point approximately near Y they are traveling at the same rate of speed and at near which point the segmental gear 6 disengages from the rack 17.

In operation of the press, power being applied to the belt wheel, it causes the impression cylinder to rotate, and in unison with each revolution of the cylinder, through the crank shaft, and engaging members the form-carrying bed is caused to reciprocate in its travels, once for each revolution of the impression cylinder, the return of the form-carrying bed being much faster than the printing stroke.

From the above description it will be apparent that I have produced a printing press which embodies the features of advantage set forth as desirable in the statement of the object of the invention, and while I have illustrated and described the preferred embodiment of the invention, it is understood that I reserve the right to make such changes in the form, proportion, detail construction, and arrangement of parts, as properly fall within the spirit and scope of the appended claims.

I claim 1. In a printing press, the combination of a frame, a continuously-driven power member, a revolving member driven by said power member and having a cylinder revolvably mounted thereon, a crank shaft engaging with the power member and through a radial slot driving an oscillating member, a reciprocatory bed, means operatively connected for transmitting power from the oscillating member to the reciprocatory bed, and a resilient member connecting the revolving member with the cylinder.

2. In an impression press, the combination of a frame, a continuously-driven power member, a printing cylinder driven by the power member, a reciprocatory bed, a crank shaft driven by the power member and driving an oscillating member, and a counter shaft engaging with the oscillating member and the reciprocatory bed.

3. In a printing press, the combination of a frame, a continuously driven power memher, a revolving member driven by the power member, an impression member mounted upon and flexibly connected with the revolving member, a reciprocatory bed driven by the power member through operative means, movable ournals carrying the revolving member and eccentrically mounted in the frame of the press.

a. In a printing press, the combination of a frame, a continuously-driven power member, a revolving member driven by the power member and having a cylinder revolvably mounted thereon, a crank shaft engaging with the power member and through a radial slot driving an oscillating member, a reciprocatory bed, means operatively connected for transmitting power from the oscillating member to the reciprocatory bed, a resilient connection between the cylinder and the revolving member, a movable ournal carrying the revolving member and eccentrically mounted in the frame of the press.

5. In a printing press, the combination of a frame, a continuously-driven power member, a revolving member driven by the power member and having a cylinder revolvably mounted thereon, a crank shaft engaging with the power member and through a radial slot driving an oscillating member, a reciprocatory bed, a countershaft engaging with the reciprocatory bed and the oscillating member, and a resilient member connecting the cylinder with the revolving member.

6. In a printing press, the combination of a frame, a continuously-driven power member, a cylinder driven by the power member, a reciprocatory bed, a crank shaft driven by the power member, means for transmitting power from the crank shaft to the oscillating member, means for transmitting power from the oscillating member to the reciprocatory bed, and a segmental gear mounted on the cylinder that engages with a rack on the reciprocatory bed.

7. In a printing press, the combination of a frame, a continuously-driven power memher, a revolving member driven by the power member and having a cylinder revolvably mounted thereon, a crank shaft engaging with the power member and through a crank pin driving an oscillating member, a reciprocatory bed, operated means for connecting the reciprocatory bed with the oscillating member, a segmental gear integral with the cylinder that engages with the reciprocatory bed, and a resilient member connecting the cylinder with the revolving member.

8. In a printing press, the combination of a frame, a continuously-driven power memher, a revolving member driven by the power member and having a cylinder revolvably mounted thereon, a crank shaft engaging with the power member and through a crank pin and radial slot driving an oscillating member, a reciprocatory bed, a countershaft engaging with the reciprocatory bed and the oscillating member, a segmental gear integral with the cylinder that engages with a rack on the reciprocatory bed, and a resilent member connecting ,the cylinder with the: re

' volving member.

'9. In aprinting press, the combination of- :1 frame a continuously-driven power member, a revolving member driven by the power member and havingan impression cylinder i-evolvably mounted upon it, a; Crank shaftdriven by the powermember, a reciprocatoi' 1 bed' oaer'ative, 111ea11s-'en 'a'0"inm the 7 b D C) crank? shafts the irecip rocatoi'y bed, a rack on; the IBOIPIOGZIL'EOIY" bed, segmental gear integral" with the impression cylinder, that BHgZLgQSWltlltht-J rack on the reciproca toi'y beclya nd a resilien'c' member connecting vthe. impression cylinder with the revolving 

